Finding the Fourth Proportional to 13,080.55, 18,051.90 and 7,112.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,080.55 : 18,051.90 = 7,112.09 : x
2. Step 2: Convert to fraction form
   13,080.55/18,051.90 = 7,112.09/x
3. Step 3: Cross multiply
   13,080.55x = 18,051.90 × 7,112.09
4. Step 4: Simplify right side
   13,080.55x = 128,386,755.93
5. Step 5: Solve for x
   x = 128,386,755.93/13,080.55
6. Step 6: Final answer
   x = 9,815.09